Sheet Metal Materials Guide

Steel Grades & Size Specifications

Steel Grade	Size Specifications
SUS304	Round Bar: 2 mm – 355 mm Hex Bar: 3/16" – 50 mm Square Bar: 5 mm – 80 mm Angle Bar: 3–10 mm (t) × 20–100 mm (w) Flat Bar: 3–25 mm (t) × 16–100 mm (w) Sheet: 0.05 mm – 100 mm Pipe: 1/8"–12" (OD) × Thickness 0.8–6 mm Seamless Pipe: 1/8"–12" (OD) × Thickness 5S–160S
SUS303	Round Bar: 2.5 mm – 170 mm Hex Bar: 4.75 mm – 50 mm
SUS316	Round Bar: 5 mm – 355 mm Hex Bar: 3/16" – 50 mm Square Bar: 5 mm – 60 mm Angle Bar: 4–10 mm (t) × 25–100 mm (w) Twisted Bar: 4 mm – 100 mm
SUS310S	Round Bar: 6 mm – 200 mm Plate: 0.6 mm – 50 mm Seamless Pipe: 1/8"–6" (OD) × Thickness 10S–160S Sheet: 1.0 mm – 50 mm
SUS410	Round Bar: 5 mm – 355 mm
SUS416	Round Bar: 2 mm – 355 mm
SUS420J2	Round Bar: 2 mm – 450 mm Sheet: 1.5 mm – 6.0 mm Mold Steel Blocks: 300 × 500 mm, 500 × 700 mm
SUS440C	Round Bar: 13 mm – 310 mm Mold Steel Blocks: 155 × 310, 210 × 440, 300 × 500 mm
SUS630	Round Bar: 6 mm – 200 mm

※ For reference only. Please contact us for detailed specifications.

AISI	Typical Applications
304	Household hardware, automotive industry, medical equipment, architectural fittings.
303	Free-machining stainless steel for mass-produced mechanical components and fasteners.
316	Medical devices, bolts, connectors, valves, and precision machined parts.
316L	Petrochemical and chemical equipment requiring high corrosion resistance.
321	High-temperature and heat-resistant applications such as automotive components.
410	Cutting tools, locks, valves, and wear-resistant components.
416	Free-machining stainless steel for wear-resistant mechanical parts.
420	High-hardness products such as pump parts, cutlery, and surgical instruments.
430	Corrosion-resistant equipment, automotive parts, and appliances.
440C	High-hardness applications such as cutting tools, pumps, and gauges.
630	Precipitation-hardened stainless steel for aerospace and high-strength components.